Ultra-Wide to Telephoto Zoom. The Fujinon UA18X5.5BERD B4 Lens for 2/3 Sensors is an ultra-wide to telephoto lens for 2/3"-format cameras, designed for advanced 4K optical performance. It has a 18x zoom ratio and includes a 2x extender that effectively doubles its focal range. Its maximum aperture is a fast f/1.8 at 5.5 to 62mm, while it’s a slower f/2.8 at 100mm. This lens includes an ergonomic digital servo zoom control.

Servo Zoom Control. This lens features a digital servo for zoom control, and focus can be either manual or servo-controlled.

Fast Zoom Speed. Fujinon’s QuickZoom technology gives you a 0.7-second end-to-end zoom speed. With the push of a button, QuickZoom facilitates a quick shift to the telephoto end to check focus. The lens automatically returns to your selected focal length as soon as you release the button.